Assignee
Inventors
- Boy Cornils (42 patents)
- Josef Hibbel (9 patents)
- Gunther Kessen (3 patents)
- Werner Konkol (19 patents)
- Bernhard Lieder (11 patents)
- Ernst Wiebus (34 patents)
- Heinz Kalbfell (6 patents)
- Hanswilhelm Bach (22 patents)
US Patent 4533755 · Granted Aug 6, 1985